From: Wenyou Yang <wenyou.yang@microchip.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v6 5/9] board: sama5d2_xplained: Make SPL work on spiflash
Date: Wed, 13 Sep 2017 14:58:50 +0800 [thread overview]
Message-ID: <20170913065854.26134-6-wenyou.yang@microchip.com> (raw)
In-Reply-To: <20170913065854.26134-1-wenyou.yang@microchip.com>
Because before switching to a lower clock source, we must switch
the clock source first instead of last. So before configuring the
PMC_MCKR register, invoke at91_mck_init_down() first.
As said in datasheet, the the size of SPL must not exceed the maximum
size allowed(64Kbytes).
Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None
board/atmel/sama5d2_xplained/sama5d2_xplained.c | 10 ++++++++++
include/configs/sama5d2_xplained.h | 2 +-
2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/board/atmel/sama5d2_xplained/sama5d2_xplained.c b/board/atmel/sama5d2_xplained/sama5d2_xplained.c
index 7e0cb4228f..5758653030 100644
--- a/board/atmel/sama5d2_xplained/sama5d2_xplained.c
+++ b/board/atmel/sama5d2_xplained/sama5d2_xplained.c
@@ -247,6 +247,16 @@ void at91_pmc_init(void)
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
u32 tmp;
+ /*
+ * while coming from the ROM code, we run on PLLA @ 492 MHz / 164 MHz
+ * so we need to slow down and configure MCKR accordingly.
+ * This is why we have a special flavor of the switching function.
+ */
+ tmp = AT91_PMC_MCKR_PLLADIV_2 |
+ AT91_PMC_MCKR_MDIV_3 |
+ AT91_PMC_MCKR_CSS_MAIN;
+ at91_mck_init_down(tmp);
+
tmp = AT91_PMC_PLLAR_29 |
AT91_PMC_PLLXR_PLLCOUNT(0x3f) |
AT91_PMC_PLLXR_MUL(82) |
diff --git a/include/configs/sama5d2_xplained.h b/include/configs/sama5d2_xplained.h
index 891218d83e..aedd5684c4 100644
--- a/include/configs/sama5d2_xplained.h
+++ b/include/configs/sama5d2_xplained.h
@@ -61,7 +61,7 @@
/* SPL */
#define CONFIG_SPL_FRAMEWORK
#define CONFIG_SPL_TEXT_BASE 0x200000
-#define CONFIG_SPL_MAX_SIZE 0x18000
+#define CONFIG_SPL_MAX_SIZE 0x10000
#define CONFIG_SPL_BSS_START_ADDR 0x20000000
#define CONFIG_SPL_BSS_MAX_SIZE 0x80000
#define CONFIG_SYS_SPL_MALLOC_START 0x20080000
--
2.13.0
next prev parent reply other threads:[~2017-09-13 6:58 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-13 6:58 [U-Boot] [PATCH v6 0/9] board: atmel: Add new board SAMA5D27-SOM1-EK board Wenyou Yang
2017-09-13 6:58 ` [U-Boot] [PATCH v6 1/9] lib: at91: Add logo files used via API of DM_VIDEO Wenyou Yang
2017-09-15 0:47 ` [U-Boot] [U-Boot, v6, " Tom Rini
2017-09-13 6:58 ` [U-Boot] [PATCH v6 2/9] atmel: common: Add function to display via DM_VIDEO's API Wenyou Yang
2017-09-15 0:47 ` [U-Boot] [U-Boot, v6, " Tom Rini
2017-09-13 6:58 ` [U-Boot] [PATCH v6 3/9] ARM: at91: spl: Adjust switching to oscillator for SAMA5D2 Wenyou Yang
2017-09-15 0:47 ` [U-Boot] [U-Boot, v6, " Tom Rini
2017-09-13 6:58 ` [U-Boot] [PATCH v6 4/9] ARM: at91: spl: Add mck function to lower rate while switching Wenyou Yang
2017-09-15 0:47 ` [U-Boot] [U-Boot, v6, " Tom Rini
2017-09-13 6:58 ` Wenyou Yang [this message]
2017-09-15 0:47 ` [U-Boot] [U-Boot, v6, 5/9] board: sama5d2_xplained: Make SPL work on spiflash Tom Rini
2017-09-13 6:58 ` [U-Boot] [PATCH v6 6/9] ARM: at91: spl: Add boot device for boot from QSPI Wenyou Yang
2017-09-15 0:48 ` [U-Boot] [U-Boot, v6, " Tom Rini
2017-09-13 6:58 ` [U-Boot] [PATCH v6 7/9] ARM: at91: mach: Add missing defines of MPDDRC Wenyou Yang
2017-09-15 0:48 ` [U-Boot] [U-Boot, v6, " Tom Rini
2017-09-13 6:58 ` [U-Boot] [PATCH v6 8/9] ARM: at91: Get the Chip ID of SAMA5D2 SiP Wenyou Yang
2017-09-15 0:48 ` [U-Boot] [U-Boot, v6, " Tom Rini
2017-09-13 6:58 ` [U-Boot] [PATCH v6 9/9] board: atmel: Add SAMA5D27 SOM1 EK board Wenyou Yang
2017-09-15 0:48 ` [U-Boot] [U-Boot, v6, " Tom Rini
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170913065854.26134-6-wenyou.yang@microchip.com \
--to=wenyou.yang@microchip.com \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox